Restoring proper use of '$' in XSL (replaced with 'jQuery')

These are old problems resulting from hasty subsitution for jQuery, but they clobbered valid XSL variables and (in some cases) jQuery selectors.
Adding 'lang' attribute to <HTML> elements (for audio screen readers)
ALT text for images, TITLE for unlabeled fields.
Merge remote-tracking branch 'origin/jima-accessibility-sweep' into dryad-staging

Conflicts:
	dspace/modules/xmlui/src/main/webapp/themes/Mirage/Mirage.xsl
Correct tag match error